Cardboard box



May 15, 1928.

F. R. CLOSE CARDBOARD BOX Filed May 2, 1925 2 Sheets-Sheet l H M J May15, 1928.

F. R. CLOSE CARDBOARD BOX Filed May 2, 1925 2 Sheets-Sheet 2 PatentedMay 15, 1928.

UNlTED STATES PATENT OFFICE.

IRAN C18 ROBERT CLOSE, OI BAIILTON, ONTARIO, CANADA, ASBIGNOB 'I'O rm:DUN- CAN LITHOGBAPHING COMPANY, LIMITED, HAMILTON, ONTARIO, CANADA.

CARDBOARD 301.

Application fled Kay 2, 1925, Serial No. 27,485, and in Canada June 16,1880.

My invention relates to improvements in cardboard boxes, and the objectof the invention is to provide a more secure and reliable closure forboxes of this type than hitherto; a further object is to so constructthe box that the contents thereof will assist in maintaining theclosure; and a still fur ther object is to provide a novel type of sealfor such boxes.

My invention consists of the construction and arrangement of parts, allas hereinafter more particularly described and illustrated in theaccompanying drawings in which Fig. 1 is a perspective view of a portionof a box constructed according to my invention, showing the box in theopen position.

Fig. 2 is a perspective view thereof showing the box in the "partiallyclosed position.

Fig. 3 is a top plan view of the box in the fully closed position.

Fig. 4 is a fragmentary section on the line H of Fig. 3.

Fig. 5 is a view similar to Fig. 1 showing a modification of myinvention.

Fig. 6 is a perspective view of the modification illustrated in Fig. 5showing the box in the partially closed position.

Fig. 7 is a top plan view of the modification illustrated in Figs. 5 and6 showing two inner closure flaps in the closed position, an outerclosure flap being in the raised position and a portion thereof brokenaway.

Fig. 8 is a fragmentary section on the line 8-8 of Fig. 7.

ence indicate corresponding parts in the various views.

Reference will first he made to the form of my invention illustrated inFigs. 1 to 4, inclusive.

The invention is applicable to any ordinary cardboard box 1 andcomprises the inner closure flaps 2 and 3 carried by opposite side walls4 and 5 re ectively, and the outer closure flaps 6 carrie by the rearwall 7.

The flaps 2 and 3 are each provided with an orifice 8, disposedlongitudinally thereof.

The flap 6 is formed with a transverse crease 9 intermediately of itslength, which crease is discontinued for a space A in the centre of theflap.

This crease, it will he noted. divides the fla 6 into two sections 10and 11.

In the drawings, like characters of refer-' The flap 6 is furthercreased transversely thereof at 12 and the outer ortion comprises aninserting flap 13 w ich will be hereinafter referred to.

The fla 6 is cut through along the line 14 (see ig. 3) to form a tongue15 u on the flap section 11 and an orifice 16 wit in the flap section10.

This tongue 15 projects from the flap section 11 into the flap of thetongue coincides with the discontinued portion A of the crease 9.

It'will be noted that the crease 9 extends laterally from each end ofthe base of the tongue 15 to the adjacent side edge of the fla 6. I hefront wall of the box is indicated by the numeral 17.

Reference will now be had to the modification illustrated in Figs. 5 to8 inclusive.

In this modification, closure flaps 18 and 19 are carried respectivelyby the opposite side walls 4 and 5 ofthe box.

An outer closure flap 31 is carried by the rear wall 7, an insertingflap 20 being carried by this outer flap 31. a

The flap 18 is provided with an orifice 21 disposed transverselythereof.

The flap crease 22 mtermediately of its length crease is discontinuedfor a space 13 centre of the flap.

This crease, it will be noted, divides the flap 19 into two sections 23and 24.

The flap 19 is cut through along the line 25 (see Fig. 7) to form atongue 26 upon the flap section 24 and an orifice 27 within the flapsection 23.

This tongue 26 projects from the flap section 24 into the flap section23 and the base of the tongue coincides with the discontinued portion Bof the crease 22.

It will be noted that the crease 22 extends laterally from each end ofthe base of the tongue 26 to the adjacent side edge of the flap 19.

The fla 19 is provided with a further cut 27 theretlirough-which forms atongue 28 within the flap.

29 (see Fig. 7) indicates an adhesive sealing strip.

The construction and operation of my invention is as follows Referencewill first be had to the embodiment illustrated in Figs. 1 to 4inclusive.-

which in the section 10 and the base- 19 is formed with a transverse Itwill be noted that the closure for the box consists of three flaps 2, 3and 6 which are adapted to operate in su erimposed relation.

The flaps 2and 3 are rst folded one upon the other, the orifices 8therein being so disposed that they register withea-ch other.

The flap 6 is then folded down upon these flaps 2 and 3, the flapsection 11 being bent upwardly about the crease 9 so that the tongue 15projects through the orifices 8 into the interior of the box.

The flap section 11 is then folded downwardly and the inserting flap 13asses inwardly behind the front wall 17 o the box, in which operation,the tongue 15 moves upwardly a ainst the under face of the undermost tip2.

This completes the closing of the box.

In Fig. 4 the contents of the box, such as a bottle for instance, isindicated in broken lines by the numeral 30 and it will be clear, thatthe upper face of the article 30 will tend to force this tongue 15upwardly against the under face 0 the flap 2, thus tendin to furthersecure the tongue against withdrawal.

Both ends of the box may of course be provided with my closure, so thatthe pressure of the article within the box against the ends thereof willassist in maintaining the closure.

Reference will now be had to the modification illustrated in Figs. 5 to8 inclusive. The operation of this modification is practically the sameas that already described except that the closure flap 19, carried byone of the side walls of the box, coacts with the closure flap 18,carried by the opposite side wall, in the same manner as the flap 6co-acts with two flaps 2 and 3 in the previously described construction,the flap 31 in this case simply being a plain outer flap which closesdownwardly upon the flaps 18 and 19.

In this case the contents of the box, indicated bythe numeral 32 pressesupon the tongue 26 in the same way as previously described. i

' The operation of the sealing device illustrated in connection with themodification shown in Figs. 5 to 8 inclusive will be clear from thedrawings and comprises an adhesive sealing strip 29 which engages the uper ifiace of the tongue 28 and the top face 0? the ap 18. c

This sealing device may of course be applied to the form illustrated inFigs. 1 to 4 inclusive.

From the foregoing it will be ap arent that I have devised a closure forcardboard boxes which will be exceptionally secure and reliable and inwhich the contents of the box will assist in maintaining the closure inposition. What I claim as my invention 1s:

g A rectan lar box comprising, closure flaps carrie res ectively by theback and side walls thereo the front wall having no flap, said flapsadapted to fold u on each other to form a closure, the rear ap beingoutermost when closed, one of said flaps provided with a cut thereinforming a tongue within said flap, said fia formed with a creaseextending from eac side of the base of the tongue to the ad'acent sideedge of said flap, another of said aps which folds below the aforesaidcut flap rovided with an orifice throu h which sai tongue is adapted toextent? when the He s are folded to close the box, the rear flap tbrmedat its free end with a panel adapted to lie along the inside face of thefront wall of the box.

' FRANCIS ROBERT CLOSE.-

